<template>
    <el-container class="home_container">
        <!-- 页面头部 -->
        <el-header>
            <div>
                <img src="../assets/logo.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button></el-header>
        <!-- 页面主体去区域 -->
        <el-container>
            <el-aside :width="isCollapse ? '64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu :default-openeds="['1', '3']" text-color="#fff" background-color="#333744" active-text-color="#409eff" 
                unique-opened :collapse='isCollapse'  :collapse-transition="false" router :default-active="activePath">
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id+''" v-for="item in menuList" :key='item.id'>
                        <template slot="title"><i :class="iconsObj[item.id]"></i><span>{{item.authName}}</span></template>
                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/'+ subItem.path" v-for="subItem in item.children" :key='subItem.id' @click="saveNavState('/'+subItem.path)">
                            <template slot="title">
                                <i class="el-icon-menu"></i>
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
    
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
<script>
export default {
    data(){
        return{
            menuList:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            isCollapse:false,
            //被激活的链接地址
            activePath:'',
        }
    },
    methods:{
        logout(){
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        //获取菜单数据
        async getMenuList(){
            const {data:res}  = await this.$axios.get('menus')
            if(res.meta.status !== 200){
                return this.$message.error(res.mata.msg);
            }else{
                this.menuList = res.data
            }
        },
        // 点击按钮，提供菜单折叠与展开
        toggleCollapse(){
            this.isCollapse = !this.isCollapse
        },
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath = activePath
        }
    },
    created(){
        this.getMenuList();
        this.activePath = window.sessionStorage.getItem("activePath")
    }
}
</script>

<style lang="scss" scoped>

.el-header{
    background:#373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    div{
        display: flex;
        align-items: center;
    }
    img{
        width: 15%;
    }
}
.el-aside{
    background-color: #333744;
}
.el-main{
    background-color: #EAEDF1;
}
.home_container{
    height: 100%;
}
.iconfont{
    margin-right: 10px;
}
.el-menu{
    border-right: 0px;
}
.toggle-button{
    background: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>